Apparatus for treating metal articles



'D. C. TURNBULL APPARATUS FOR TREATING METAL ARTICLES '7 Sheets-Sheet 1 Filed Aug. 21, 1936 m m TB N mm m W n IT A .C D m D Oct. 4,1938. c; TURNBULL 2,131,770

APPARATUS FOR TREATING METAL ARTICLES Fil ed Aug. 21, 1956 '7 Sheets-Sheet 2 lNVENTOR DAVID c, TURNBULL.

ATToRN EY Oct. 4, 1938.

D. C. TURNBULL APPARATUS FOR TREATING METAL ARTICLES Filed Aug. 21, 1936 7 Sheets-Sheet 3 INVENTOR DAVID C.TURNBULL'.

OWMQJM" ATToRNY Oct. 4, 1938. D 19. TUl RNBU LL 2,131,770

APPARATUS FOR TREATING METAL ARTICLES Filed Aug. 21, 1936 7 Sheets-Sheet 4 INVENTOR DAwo CuTURNBULL.

BY .A

ATTORNEY 7 Sheets-Sheet 5 Oct. 4,,1938. D. c. TURNBULL APPARATUS FOR TREATING METAL ARTICLES :Filed Aug. 21, 1936 INVENTOR DAVID C.-TURNBULL. BY

ATTORNEY wimvm w E 5 mum Oct. 4,1938. D. c. TURNBULL 1,7 APPARATUS FOR TREATING METAL ARTICLES Filed Aug. 21, 1936 7 Sheets-Sheet 6 INVENTOR DAVID C. TURNB'ULL. BY

' ATTORNiEY.

Oct. 4, 1938. D. c. TURNBULL 2,131,770

- APPARATUS FOR'TREATING METAL ARTICLES Filed Aug. 21, 1936 '7 Sheets-Sheet 7 INVENTOR DAVID TURNBULL ATTORN EY Patented Oct. 4, 1938 UNITED STATES .PATENT OFFICE APPARATUS FOR TREATING .METAL ARTICLES David C. Turnbull, Mishawaka, 1nd,, assign'or to American Foundry Equipment Company, Mishawaka, Ind., a corporation of Delaware Application August 21, 1936, Serial No. 97,101

12 Claims. (01. 51-9) pletely and uniformly exposed to the treating stream. It is also desirable that the treatment be carried out rapidly, continuously and in an efficient manner. The articles or stock should be manipulated in a readily controlled manner 15 and should be supported and handled in such.

manner that there is no detrimental bending,

twisting or scraping of the articles or stock.

According to the present invention, a fanshaped stream of treating particles moving at highvelocity and definingan impingement pattern of substantial length is developed through which the elongated stock to be'.treated is simultaneously advanced and rotated to uniformly treat all exterior surfaces of the stock. The work piece or material is suitably supported so as to prevent bending due to its-own weight or the force of the treating stream and is rotated about its axis positively and in such a manner as to prevent injurious torsional stresses from being :39 induced therein. a

The inventionprovides suitable apparatus for carrying out the process, comprising an abrasive throwing wheel operative to throw a controlled streamof abrasive against the. elongated stock,

35 the wheel'ope'ratin'g in conjunction and cooperation with conveyor mechanism which simultaneously [advances and rotates the stock lengthwise through and in substantial parallelism with the elongated impingement pattern developed by 40 the abrasive-throwing wheel. The conveying apparatus manipulates the stock so as to subject all exterior portions and areas thereof to the abrasive treating and cleaning action of the fan'- shaped stream. The conveying mechanism in-' 45 cludes one or more driving mechanisms, each including a plurality of' spaced and rotatable'members adapted to engage the work piece. under a controlled or resilient force and suitably driven so. as to advance the work piece throughthe so treating stream. The driving members are carried on.a suitable frame which is mounted for" rotation aboutthe axis of movement of the work piece and is suitably driven to rotate the work piece simultaneously with its forward movement. 55 The driving mechanism may be sumciently closely spaced onsuitable supporting means, such as rolls, guides, or the like, to support the weight of the workpiece and resist the force of the treating stream. An enclosing chamber or cabinet may be provided for enclosing the stream 5 of treating material and preventing loss of treating material or injury to workmen.

The invention provides relatively simple and rugged apparatus for effecting a combined forward and rotational movement of the work piece, 10 which can be closely and positively controlled in close cooperation with the abrasive-throwing wheel. The work piece is carried through a relav tively elongated fan-shaped 'stream'of treating.

material and can be advanced at a relatively rapid rate, thus effecting substantial economy/in operation over cleaning methods and apparatus heretofore employed. The work piece is advanced without being subjected to any substantial bending, twisting, rubbing, scraping, biting, 0

orother. injurious stresses or actions. The app'aratus is adapted for handling various shapes and sizes of work pieces without necessitating any changes or modifications.

An object of the present invention is the provision of an improved apparatus for cleaning, polishing, hardening, or otherwise treating elongated metal articles 'and stock, in a rapid and efficient manner without injury thereto.

Another object of the invention is the provision of apparatus for carrying out the herein described operations which'is rugged, eflicient and economical to build and operate, and which can be operated with a minimum of attention.

Another .object of the invention is the provision of apparatus suitable for treating articles and stock of various cross-sectional shapes and sizes without requiring any changes or adjustments in the mechanism.

Various other features, objects and advantages 9 of the invention will be apparent from the following particular description and from-an inspection of the accompanying drawings.

Although the novel features which are believed to be characteristic of this invention will be particularly pointedout in the claims appended hereto, the invention itself, as to its objects and. advantages, and the manner in which it may be carried out, may be better understood by referring tothe following description taken in connection with the accompanying drawings forming a part thereof, in which:

Fig. 1 is a side'elevational view of one form of apparatus constructed in accordance with the in tional view of the article-advancing mechanism,

this view being taken along line 55 of Fig. 2;

Fig. 6 is a transverse cross-sectional view of the article-advancing, mechanism, this view being taken along line 56 of Fig. 5;

Fig. '7 is a transverse cross-sectional view of the article-advancing mechanism, this view being taken along line 'l- -'I of Fig. 5;

Fig. 8 is a longitudinal cross-sectional view of the article-advancing mechanism, this view being taken along line 8-8 of Fig. 7;

Fig. 9 is a somewhat diagrammatic reduced cross-sectional view generally similar to Fig'. 6 and illustrating the operation of the apparatus in handling an article or length of stock of angu- 4 lar cross-section; and

- and an exit openinglyjDisposed in alignmentv Fig. 10 is a view similar to Fig. 9, illustrating, however, the operation of the apparatus in handling an article or length of stock having a generally rectangular cross-section.

In the following description and in the claims, various details will be identified by specific names for convenience, but they are intended to be as generic in their application as the art will permit. Like reference characters denote like parts in the several figures of the drawings.

In the drawings accompanying and forming part of this specification, certain specific disclosure of the invention is made for purposes of explanation, but it will be understood that the details may be modified in various respects without departure'from thebroad aspect of the invention. I

Referring now toFlgs. 1, 2, 3 and 5 of the drawings, there is shown a housing I defining a treating chamber 2 and having an entrance opening 3 with the opening 3 is a driving mechanism 5 and disposed in alignment with theexit 4 is a. second driving mechanism 6 which may be similar to the driving mechanism 5. Athrowing wheel I 8 may be suitably mounted toproject a stream a of treating material in the chamber 2 and against a work piece 11 extending through the housing I and supported by the driving mechanisms 5 and 3.

The wheel I preferably includes a plura ity of spaced throwing blades II disposed in a generally radial arrangement and extending from adjacent the periphery of the wheel to inwardly shortbf the center to define a generallycentral space I2. Disposed in the central space I2 is an impeller I3 having a plurality of vanes I4. Surrounding the impeller I3 is a generally cylindrical control member II having an outlet opening IS. The control member I is fixed relative to the blades I I and impeller l3, but may be adjusted angularly for the purpose of adiustably controlling the treating particles, as

- and carried by a-"pair of spaced and generally parallel side plates 20 and 2I. The throwing blades II, impeller I3 and side plates 20 and 2| may be carried by a hub I! mounted on a shaft I3 rotatable in bearings IS /hereby the impeller I 3 and throwing blades II may be rotated as a unit. The shaft I8 may be driven by a suitable source of power, such as a motor 26, connected by a suitable drive 21 to the shaft I8.

The wheel I 0 may be supplied with treating material by a feed pipe 30 extending through an opening 3I in the side plate 20 and terminating adjacent the impeller I3. The treating material may be contained in a storage hopper 32 .preferably disposed above the feed pipe 30 and communicating therewith by a conduit 33, through which the treating material may flow by gravity to the feed pipe 30.

The treating material may include any suitable granular material, such as, for example, cracked steel grits, smooth steel shot, quartz sand or other material suitable for cleaning, polishing, hardening or otherwise modifying the surface characteristics of the work piece. It will be understood that the term abrasive" as herein used includes not only materials which are inherently abrasive but also those which exert a smoothing and polishing action, and any other suitable materials;

The wheel I0 is operated by energizing the motor 26 which eifects rotation of the wheel and abrasive is supplied to the wheel as above described. The abrasive is fed into the path of the impeller vanes I4 and is hurled thereby through the outlet opening I6 and into the path of the throwing blades II. The abrasive is urged along the leading faces of the throwing blades II and is projected from adjacent the periphery of the wheel by combined centrifugal and rotary force. The proiected abrasive leaves the wheel in the form of a fanlike stream having components extending throughout a substantial range of angularity and the stream forms an elongated and generally rectangular, impingement pattern on a plane disposed below the wheel and generally parallel with the axis of rotation of the wheel.

Side walls 40 and bottom walls H of the housing I may be formed to constitute a hopper adapted to collect the spent abrasive which has been projected by the wheel III. The spent abrasive may flow by gravity into the bottom portion of an elevator housing 42, and. an elevator 43 may be provided for lifting the spent abrasive to the storage hopper 32. The elevator 43 may be driven by a motor 44 connected by a drive 45 to the elevator 43. Upon energization of the motor 44, the spent abrasive is lifted from the bottom portion of the elevator housing 42 and deposited in the storage hopper 32.

The driving mechanisms 5 and 6 may be substantially similar in construction and operation and hence only one of these mechanisms will be described in detail herein. Preferably the driving mechanisms 5 and 6 are disposed outside the housing I and at each end thereof, as shown in Fig. 1. Each driving mechanism may be supported on a suitable frame 63 connected .to the adjacent portion of the housing I by an angle".

Referring again to Fig.5, the driving mechanism 5 includes a pair of spaced and generally parallel stationary heads 62 rigidly secured to the frame 60, in oppositely facing arrangement. Rotatably mounted in the heads 63 is a drum 65 adapted to carry the mechanism for advancing the work piece 9.

The drum 65 issupported at each end by a roller bearing 63 which includes. a pluraiityof spaced rollers 66 positioned between roller rings 61, which rings carry pins 68 upon which the rollers 66 are rotatably mounted. The rollers 66 travel in a raceway 69 in each head 62 and a shoulder III on each drum retains the corresuch as belt 15, may be trained around apulley "[4 and around the drum 65. Uponenergizaiion of the motor II the pulley I4 is rotated and imparts corresponding rotation to the drum 65. Suitable take-up means It may be provided for adjusting the position of the motor H, thereby to adjustthe tension onthe belt I2.

Also, suitable means (not shown) may be provided for maintaining suflicient tension on the belt 15.

The moor H also may be connected to the drum 65 of the other driving mechanism 6 (see Fig. 1) by a suitable connection (not shown) or a second motor and drive (not shown) similar to that described in connection with the mechanism 5 may b provided. In either case, it is preferable that the drums 65 be driven in synchronism.

Dlsposedwithin the drum 65, and. secured thereto, are partitions 80, 8| and 82. A sleeve 83 is secured to the partition 82, as by means of a flange 84 and extends through an opening -85 in the right-hand (as viewed in Fig. 5) head 62. A second sleeve 86, having flanges 81 and 88 secured to partitions 8D and 8| respectively, extends through the partition 80 and through an opening 39 in the left-hand (as viewed in Fig. 5) head 62. The sleeves 83 and 85 are disposed substantially in alignment with each other and with the opening 3 in the adjacent wall of the housing i and serve as a. guide for the elongated article or work piece p to be treated.

Rotatably mounted in the chamber bounded by the partitions ti and t2 and in position to engage the work piece is a pair of pressure rolls 90. Each roll tit (see Fig. 6) preferably comprises a cylindrical portion 9| connected by a spider 92 to a hub 93. 'The hub 93 is mounted on a shaft 9% and suitably fixed thereon by a key 95. A jacket 95 formed of resilient material, such as rubber or rubber fabric, may be telescoped over the. cylindrical portion 90, in order to provide a resilient surface. for engagement with the work piece p.

Each shaft 96 is journaled in bearings 98. The bearings 98 may be integral with a sleeve 99 mounted for limited sliding movement on a vertical shaft I00, preferably fixed in the drum 65. The two sleeves 99 on each shaft may be resiliently urged toward each other by a coiled spring ifll anchored to lugs E02 connected to or integrallywith the sleeves 99. Movement of each sleeve 99 on its shaft I00 may be limited by spaced collars I93 fixed on the shaft Hill.

It will be seen that the springs I0l tend to urge the cooperating rolls 9!] toward one another until the sleeves 89 engage the inner collars I03.

Thus, when a work piece of suitable diameter is inserted between therolls 90, the latter will bear against the work piece with considerable pressure and pinch the work piece therebefween. The Q springs IOI, however, permit the rolls 90 to be separated to accommodate a work piece of larger diameter.

One of the stationary heads (see Fig. 8), for

example head 63, may be formed with an inwardly projecting angular -.flange H0 and an internal ring gear Ill may be secured therein. A pinion 2 maybe fixedly carried on a shaft. 3 journaled in bearings I It and iii secured to the partitions and 8|. The pinion H2 is mounted in position to mesh with the ring gear "I during the entire rotational movement of the drum 55. Fixedly carried on the shaft 3 is a worm I20 meshing with a pair of worm wheels I22 each. of

which is carried on a shaft I23, journaled ina bearing :24, suitably supported on the partition 80. A sprocket I25 is fixed on the shaft I23 and a chain I26 is trained over the sprocket I25 andalso over a sprocket I21 fixed on the shaft. .1

It will be seen that each roller thus isconnected'through a positive drive to the single w'orm H20. Upon rotation of the drum 6 5, the pinion H2 is carried around the internal ring gear III with a planetary movementand the shaft 3 is rotated. The rotation of the shaft H3 is transmitted to and effects rotation of the pressure about theirown axes by the rotation of the drum 55. The driving mechanism 6 is similarly operated.

A work piece :0, such as, for example, a pipe or tube, is inserted in the sleeve 83 and forced between the pressure rolls 90, the springs IM expanding sufficiently to permit the rolls 90 to separate and admit the work piece p. As soon as the work piece p is gripped by the pressure rolls 9t, the latter roll relatively thereto and advance the work piece into the chamber 2 (to the left as viewed in Figs. 1 and 5). The work piece is also rotated about 'its axis, owing to the rotation of the pressure rolls. at about the axis of the drum like movement which advances it into the chamher 2 and rotates it about its own axis. 7

As the work piece p passes into and through the stream of abrasive a, it is struck by the rapidly moving particles of treating material and cleaned, polished, hardened or otherwise treated, accordingto the nature of the treating material. The driving mechanisms 5, 5 may be located sufficiently close to one another to support the weight of the work piece, or the portion of the material extending between the driving mechanisms, and also resists the thrust of thestream on the work piece so that there is no detrimental bending of the work piece. a

The stream a extends over a substantial length and strikes the workpiece p at varying angles thereby entering any cavities or depressions in the work piece, and effectively. loosening and removingall foreign matter which may adhere'to also produces rotation of the pressure rolls '90 65. The work piece p, therefore, is given a screwthe work piece or otherwise producing the desired eflfect. Since the work piece is rotated, all portions of the circumference are successively turned up into position to be struck by the treating particles. I Y

Thework piece passes through the chamber 2 and into the second driving mechanism 6, which cooperates with the work piece in a manner similar to the driving mechanism 5. The work piece is advanced out of the second driving mechanism 5 and is then ready for use or further treatment.

Since the rolls 90 are urged together by and are restrained against separation by the springs illl, the rolls will accommodate work pieces of varying diameters, hence the second work piece of either smaller or larger diameter than the first work piece can be inserted immediately after the first work piece passes through the pressure rolls. If the new work piece is smaller, the springs IOI will urge the pressure rolls 90 closer together and into engagement with the work piece. If the second work piece is larger, the springs llli will expand and permit the rolls 90 to accommodate themselves to this larger work piece. The apparatus also will accommodate work pieces which vary in diameter or cross-section through their length, the rolls 90 moving farther apart or closer together according to the cross-sectional dimension of the work piece to be accommodated.

The present apparatus also is suitable for handling members of lengths of stock having crosssections other than round. Is is not necessary to change the apparatus in any way to accommodate the various types of work pieces. Work pieces of various cross-sectional sizes and shapes can be fed successively as part of a substantially continuous operation, without shutting down or adjusting the apparatus. t,

Referring now to Fig. 9 there is showrizdiagrammatically the manner in which the pressure rolls cooperate with an angle or L-beam n. One of the rolls bears against the edges of the webs of the angle 11 and the other roll bears against the edge or apex. The rolls 90 rotate and drive the angle'n forwardly and at the same time the rolls 90 rotate bodily about the axis of the drum 65 and thus turn the angle 12 about this'axis. It willbe understood that as the angle 11. is advanced through the abrasive stream a the angle 12 is turned about so that both the inside and outside surfaces and the edges are evenly and fully treated.

Referring now to Fig. 10 there is shown diagrammatically the cooperation between the rolls and a bar 1' or other member having a generally rectangular cross-section area. It will be seen that the rolls 90 bear against the opposite surfaces of the bar r and thus when the rolls are rotated the member 1 is advanced through the stream. The rolls 90 also rotate about the axis of the drum 65 and turn the bar r about its axis thereby exposing successively the several surfaces and edges of the bar r to the abrasive stream.

Where the work piece has a suitable cross-sectional shape as, for example, circular, it may be supported within the housing I by a suitable number of freely rotatable rolls (not shown), suitably journaled in the housing. A jacket (not shown) of resilient material such as rubber, rub- .ber fabric, ,or the like, may be provided for each roll in order to protect the roll against the wearing action of the treating particles. The rolls (not shown) preferably are suitably spaced so that the unsupported length of the work piece is insuflicient to permit appreciable bending of the latter.

It should be apparent from the foregoing that the present apparatus is suitable for treating a large number of different members and lengths of stock having various cross-sectional shapes and sizes. By way of example, the apparatus is suitable for treating pipes, tubes, rods, strips, bars, angles, channels, beams, various metal sections, structural elements, and various other elongated members and lengths of stock. The apparatus is also suitable for operating continuously upon metal material and is especially well adapted for treating metal stock which has been rolled or drawn and before it is cut into predetermined lengths. The present apparatus is substantially automatic in operation and can be installed as an element of a continuous production line.

The present method and apparatus provide completeand uniform treatment of the .work piece or material. The work piece or material is advanced continuously and at a predetermined and controlled rate and hence there is no opportunity for over or under treatment. The abrasive stream may have a relatively elongated impingement pattern and the work piece or material may be advanced through the stream at a relatively high rate of speed, thus operating at high efliciency and low cost. By way of example, in one installation, made in accordance with the present invention, a length of pipeapproximately six inches in diameter was completely and satisfactorily cleaned at a rate of approximately twelve linear feet per minute. The rate of cleaning and treating can be further increased by providing the apparatus with two or more abrasivethrowing wheels each arranged to throw a stream of abrasive against thev advancing work .piece.

The wheels may be mounted in alignment or out of alignment or above and below and at each side of the work piece, as desired.

Preferably, the work piece is advanced with such pitch, that it is rotated several times in the course of its travel through the stream. However, if desired, the pitch may be so selected that each portion of the surface of the work piece passes through the stream but a single time. Generally it is preferable that the several portions of the work piece be passed through the stream a number of times. It will be noted that the conveyor mechanism and the work piece-supporting apparatus is so arranged that no part oi. the apparatus comes into contact with the stream of thrown abrasive.

The pressure rolls which engage the work piece are rotated with the work piece as a unit and hence-ther are no torsional stresses set up with the work piece while in the apparatus. Since the rolls 90 roll relatively to the work piece there is no substantial drag or friction tending to cause any twist or bending of the work piece, nor is there any scraping or rubbing of the work piece. The work piece is suitably supported against bending due to unsupported weight or due to the thrust of the treating material and thus no deformation results from treatment in accordance with the present invention.

The present apparatus is relatively simple and rugged and is very compact and may be located in mills where space is at a premium. Only a single abrasive-throwing wheel is required, since the work piece is continuously rotated in the stream and all portions may be treated by a single stream, although it is understood that where high speed production is required, two or more wheels can be mounted in the cabinet to satisfy production requirements. The apparatus is relatively self-contained and it is necessary only to provide suitable connections for energizing the driving motors.

While certain novel features of the invention have been disclosed and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes may be made by those skilled in the art without departing from the spirit of the invention.

What is claimed is:

1. Apparatus for blast cleaning elongated metal members or stock including, means for projecting a stream of abrasive particles, gripping means 75 1 adapted to resiliently grip the member or stock, means for actuating said gripping means to advance the member or stock through said stream,

and means for turning said gripping means bodily with the, member or stock and simultaneously with its forward movement.

2. Apparatus for blast cleaning elongated metal members or'stock including, means for projecting a stream of abrasive particles, a plurality of pinch rolls adapted to relativelygrip the memher or stock, means for rotating said rolls about their axes to advance the member or stock. means mounting said pinch rolls for turning movement bodily with the member or stock, and

driving means for turning said rolls with the member or stock simultaneously with its forward frictional elements to advance said member,

means mounting said frictional elements for rotation about a common axis and means for rotating said frictional engaging elements about said common axis whereby to rotate said elongated member about said common axis simultaneously during the advancing movement of said member.

4. Apparatus for blast cleaning elongated metal articles including, means for projecting a stream of abrasive particles, a plurality of members adapted to frictionally engage an article to be treated, means mounting said frictional engaging members for rotation about individual axis and for relative separation, means resiliently urging said frictional members together whereby to engage said article, means for rotating said frictional members to advance said article through said stream, means mounting said frictional members for rotation about a common axis, and means for rotating said frictional members about said common axis whereby to rotate said article in said stream about an axis extending in the direction of forward movement.

5. Apparatus for blast cleaning elongated metal articles including, means for projecting a, stream of abrasive particles, 2. driving-member, means mounting said member for rotationabout an axis extending transversely to the direction of movement of the article-to be treated, means for rotating'said driving member whereby to advance said article forwardly throughsaid stream, means supporting said mounting means for rotation of said driving memberabout an axis extending in the direction of forward movement of said article, and means for rotating said mounting means whereby to rotate said article about said second axis 'an'din said stream.

6. Apparatus for blast cleaning metal articles including, means for projecting a stream of abrasive particles, a rotatable drum, means mounting said drum for rotation, a plurality of pinch rolls carried. in said drum, means for rotating said drum to turn said pinch rolls about a common axis, and means actuated by the rotation of said drum for driving said pinch rolls to advance the article through said stream.

'7. Apparatus for blast cleaning elongated metal articles including, a plurality of pinch rolls, means for projecting a stream of abrasive particles, a rotatable frame, means mounting said pinch rolls in spaced relationship on said frame, means resiliently urging said pinch rolls together against the article to be treated, means for rotating said pinch rolls to advance the article through said stream, and means for rotating said frame to rotate the article about an axis extending in the direction of its forward movement.

8. Apparatus for blast cleaning elongated metal articles including, means for projecting a stream vof abrasive particles, a plurality of pinch rolls, a

rotatable frame, means mounting said pinch rolls in spaced relationship on said frame, means resiliently urging said pinch rolls together against the article to be treated, means for rotating .said frame to rotate the article about an axis extending in the direction of its forward movement, and

means actuated by the rotation of said frame for rotating said pinch rolls to advance -the article through said stream.

9. Apparatus for blast cleaning elongated work pieces including, a treating chamber, a rotatably mounted driving member, means for urging said driving member into driving engagement -with said work piece, means for rotating said driving member to advance said work piece through said chamber, and means for rotating said driving member and work piece about a common axis.

10. Apparatus for blast cleaning elongated metal articles including, means for projecting a streamof abrasive particles, a driving member adapted to support an article to be cleaned, means for actuating said driving member to advance the article to be cleaned through said stream, and means for rotating said driving member about an axis extending in the direction of forward movement of said article whereby to turn said article about said axis simultaneously with its forward movement through said stream.

11. Apparatus for blast cleaning elongated metal articles including, means for projecting a stream of abrasive particles, a plurality of spaced driving rolls adapted to support an article tov be cleaned, means adjustably mounting said rolls to widen or narrow the space therebetween, means resiliently urging said rolls toward one another to grip the article therebetween, means for rotating said driving rolls for advancing thearticle gripped therebetween through said stream, frame, means mounting said driving'rolls forrotation. about an axis extending in the'direction of forward movetion of forward movement of said article whereby to turn said article about said axis simultaneously 'with its. forward movement, and driving means actuated by the rotation of said frame for rotating said driving member on said frame.

main: 0. TURNBUIL. 

